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-rw-r--r--emacs/guix-base.el863
1 files changed, 28 insertions, 835 deletions
diff --git a/emacs/guix-base.el b/emacs/guix-base.el
index d9c70aae9e..dae658ebfa 100644
--- a/emacs/guix-base.el
+++ b/emacs/guix-base.el
@@ -22,124 +22,32 @@
 ;; This file provides some base and common definitions for guix.el
 ;; package.
 
-;; List and info buffers have many common patterns that are defined
-;; using `guix-define-buffer-type' macro from this file.
-
 ;;; Code:
 
 (require 'cl-lib)
-(require 'guix-profiles)
 (require 'guix-backend)
 (require 'guix-guile)
+(require 'guix-read)
 (require 'guix-utils)
-(require 'guix-history)
-(require 'guix-messages)
-
-
-;;; Parameters of the entries
-
-(defvar guix-param-titles
-  '((package
-     (id                . "ID")
-     (name              . "Name")
-     (version           . "Version")
-     (source            . "Source")
-     (license           . "License")
-     (synopsis          . "Synopsis")
-     (description       . "Description")
-     (home-url          . "Home page")
-     (outputs           . "Outputs")
-     (inputs            . "Inputs")
-     (native-inputs     . "Native inputs")
-     (propagated-inputs . "Propagated inputs")
-     (location          . "Location")
-     (installed         . "Installed"))
-    (installed
-     (path              . "Installed path")
-     (dependencies      . "Dependencies")
-     (output            . "Output"))
-    (output
-     (id                . "ID")
-     (name              . "Name")
-     (version           . "Version")
-     (source            . "Source")
-     (license           . "License")
-     (synopsis          . "Synopsis")
-     (description       . "Description")
-     (home-url          . "Home page")
-     (output            . "Output")
-     (inputs            . "Inputs")
-     (native-inputs     . "Native inputs")
-     (propagated-inputs . "Propagated inputs")
-     (location          . "Location")
-     (installed         . "Installed")
-     (path              . "Installed path")
-     (dependencies      . "Dependencies"))
-    (generation
-     (id                . "ID")
-     (number            . "Number")
-     (prev-number       . "Previous number")
-     (current           . "Current")
-     (path              . "Path")
-     (time              . "Time")))
-  "List for defining titles of entry parameters.
-Titles are used for displaying information about entries.
-Each element of the list has a form:
+(require 'guix-ui)
 
-  (ENTRY-TYPE . ((PARAM . TITLE) ...))")
+(defgroup guix nil
+  "Settings for Guix package manager and friends."
+  :prefix "guix-"
+  :group 'external)
 
-(defun guix-get-param-title (entry-type param)
-  "Return title of an ENTRY-TYPE entry parameter PARAM."
-  (or (guix-assq-value guix-param-titles
-                       entry-type param)
-      (prog1 (symbol-name param)
-        (message "Couldn't find title for '%S %S'."
-                 entry-type param))))
+(defgroup guix-faces nil
+  "Guix faces."
+  :group 'guix
+  :group 'faces)
 
-(defun guix-get-name-spec (name version &optional output)
+(defun guix-package-name-specification (name version &optional output)
   "Return Guix package specification by its NAME, VERSION and OUTPUT."
   (concat name "-" version
           (when output (concat ":" output))))
 
-(defun guix-get-full-name (entry &optional output)
-  "Return name specification of the package ENTRY and OUTPUT."
-  (guix-get-name-spec (guix-assq-value entry 'name)
-                      (guix-assq-value entry 'version)
-                      output))
-
-(defun guix-entry-to-specification (entry)
-  "Return name specification by the package or output ENTRY."
-  (guix-get-name-spec (guix-assq-value entry 'name)
-                      (guix-assq-value entry 'version)
-                      (guix-assq-value entry 'output)))
-
-(defun guix-entries-to-specifications (entries)
-  "Return name specifications by the package or output ENTRIES."
-  (cl-remove-duplicates (mapcar #'guix-entry-to-specification entries)
-                        :test #'string=))
-
-(defun guix-get-installed-outputs (entry)
-  "Return list of installed outputs for the package ENTRY."
-  (mapcar (lambda (installed-entry)
-            (guix-assq-value installed-entry 'output))
-          (guix-assq-value entry 'installed)))
-
-(defun guix-get-entry-by-id (id entries)
-  "Return entry from ENTRIES by entry ID."
-  (cl-find-if (lambda (entry)
-                (equal id (guix-assq-value entry 'id)))
-              entries))
-
-(defun guix-get-package-id-and-output-by-output-id (oid)
-  "Return list (PACKAGE-ID OUTPUT) by output id OID."
-  (cl-multiple-value-bind (pid-str output)
-      (split-string oid ":")
-    (let ((pid (string-to-number pid-str)))
-      (list (if (= 0 pid) pid-str pid)
-            output))))
-
 
-;;; Location of the packages
+;;; Location of packages, profiles and manifests
 
 (defvar guix-directory nil
   "Default Guix directory.
@@ -179,538 +87,6 @@ For the meaning of location, see `guix-find-location'."
   (guix-eval-read (guix-make-guile-expression
                    'package-location-string id-or-name)))
 
-
-;;; Receivable lists of packages, lint checkers, etc.
-
-(guix-memoized-defun guix-graph-type-names ()
-  "Return a list of names of available graph node types."
-  (guix-eval-read (guix-make-guile-expression 'graph-type-names)))
-
-(guix-memoized-defun guix-refresh-updater-names ()
-  "Return a list of names of available refresh updater types."
-  (guix-eval-read (guix-make-guile-expression 'refresh-updater-names)))
-
-(guix-memoized-defun guix-lint-checker-names ()
-  "Return a list of names of available lint checkers."
-  (guix-eval-read (guix-make-guile-expression 'lint-checker-names)))
-
-(guix-memoized-defun guix-package-names ()
-  "Return a list of names of available packages."
-  (sort
-   ;; Work around <https://github.com/jaor/geiser/issues/64>:
-   ;; list of strings is parsed much slower than list of lists,
-   ;; so we use 'package-names-lists' instead of 'package-names'.
-
-   ;; (guix-eval-read (guix-make-guile-expression 'package-names))
-
-   (mapcar #'car
-           (guix-eval-read (guix-make-guile-expression
-                            'package-names-lists)))
-   #'string<))
-
-
-;;; Buffers and auto updating.
-
-(defcustom guix-update-after-operation 'current
-  "Define what information to update after executing an operation.
-
-After successful executing an operation in the Guix REPL (for
-example after installing a package), information in Guix buffers
-will or will not be automatically updated depending on a value of
-this variable.
-
-If nil, update nothing (do not revert any buffer).
-If `current', update the buffer from which an operation was performed.
-If `all', update all Guix buffers (not recommended)."
-  :type '(choice (const :tag "Do nothing" nil)
-                 (const :tag "Update operation buffer" current)
-                 (const :tag "Update all Guix buffers" all))
-  :group 'guix)
-
-(defcustom guix-buffer-name-function #'guix-buffer-name-default
-  "Function used to define name of a buffer for displaying information.
-The function is called with 4 arguments: PROFILE, BUFFER-TYPE,
-ENTRY-TYPE, SEARCH-TYPE.  See `guix-get-entries' for the meaning
-of the arguments."
-  :type '(choice (function-item guix-buffer-name-default)
-                 (function-item guix-buffer-name-simple)
-                 (function :tag "Other function"))
-  :group 'guix)
-
-(defun guix-buffer-name-simple (_profile buffer-type entry-type
-                                &optional _search-type)
-  "Return name of a buffer used for displaying information.
-The name is defined by `guix-ENTRY-TYPE-BUFFER-TYPE-buffer-name'
-variable."
-  (symbol-value
-   (guix-get-symbol "buffer-name" buffer-type entry-type)))
-
-(defun guix-buffer-name-default (profile buffer-type entry-type
-                                 &optional _search-type)
-  "Return name of a buffer used for displaying information.
-The name is almost the same as the one defined by
-`guix-buffer-name-simple' except the PROFILE name is added to it."
-  (let ((simple-name (guix-buffer-name-simple
-                      profile buffer-type entry-type))
-        (profile-name (file-name-base (directory-file-name profile)))
-        (re (rx string-start
-                (group (? "*"))
-                (group (*? any))
-                (group (? "*"))
-                string-end)))
-    (or (string-match re simple-name)
-        (error "Unexpected error in defining guix buffer name"))
-    (let ((first*    (match-string 1 simple-name))
-          (name-body (match-string 2 simple-name))
-          (last*     (match-string 3 simple-name)))
-      ;; Handle the case when buffer name is wrapped by '*'.
-      (if (and (string= "*" first*)
-               (string= "*" last*))
-          (concat "*" name-body ": " profile-name "*")
-        (concat simple-name ": " profile-name)))))
-
-(defun guix-buffer-name (profile buffer-type entry-type search-type)
-  "Return name of a buffer used for displaying information.
-See `guix-buffer-name-function' for details."
-  (let ((fun (if (functionp guix-buffer-name-function)
-                 guix-buffer-name-function
-               #'guix-buffer-name-default)))
-    (funcall fun profile buffer-type entry-type search-type)))
-
-(defun guix-switch-to-buffer (buffer)
-  "Switch to a 'list' or 'info' BUFFER."
-  (pop-to-buffer buffer
-                 '((display-buffer-reuse-window
-                    display-buffer-same-window))))
-
-(defun guix-buffer-p (&optional buffer modes)
-  "Return non-nil if BUFFER mode is derived from any of the MODES.
-If BUFFER is nil, check current buffer.
-If MODES is nil, use `guix-list-mode' and `guix-info-mode'."
-  (with-current-buffer (or buffer (current-buffer))
-    (apply #'derived-mode-p
-           (or modes
-               '(guix-list-mode guix-info-mode)))))
-
-(defun guix-buffers (&optional modes)
-  "Return list of all buffers with major modes derived from MODES.
-If MODES is nil, return list of all Guix 'list' and 'info' buffers."
-  (cl-remove-if-not (lambda (buf)
-                      (guix-buffer-p buf modes))
-                    (buffer-list)))
-
-(defun guix-update-buffer (buffer)
-  "Update information in a 'list' or 'info' BUFFER."
-  (with-current-buffer buffer
-    (guix-revert-buffer nil t)))
-
-(defun guix-update-buffers-maybe-after-operation ()
-  "Update buffers after Guix operation if needed.
-See `guix-update-after-operation' for details."
-  (let ((to-update
-         (and guix-operation-buffer
-              (cl-case guix-update-after-operation
-                (current (and (buffer-live-p guix-operation-buffer)
-                              (guix-buffer-p guix-operation-buffer)
-                              (list guix-operation-buffer)))
-                (all     (guix-buffers))))))
-    (setq guix-operation-buffer nil)
-    (mapc #'guix-update-buffer to-update)))
-
-(add-hook 'guix-after-repl-operation-hook
-          'guix-update-buffers-maybe-after-operation)
-
-
-;;; Common definitions for buffer types
-
-(defvar guix-root-map
-  (let ((map (make-sparse-keymap)))
-    (define-key map (kbd "l") 'guix-history-back)
-    (define-key map (kbd "r") 'guix-history-forward)
-    (define-key map (kbd "g") 'revert-buffer)
-    (define-key map (kbd "R") 'guix-redisplay-buffer)
-    (define-key map (kbd "M") 'guix-apply-manifest)
-    (define-key map (kbd "C-c C-z") 'guix-switch-to-repl)
-    map)
-  "Parent keymap for all guix modes.")
-
-(defvar-local guix-profile nil
-  "Profile used for the current buffer.")
-(put 'guix-profile 'permanent-local t)
-
-(defvar-local guix-entries nil
-  "List of the currently displayed entries.
-Each element of the list is alist with entry info of the
-following form:
-
-  ((PARAM . VAL) ...)
-
-PARAM is a name of the entry parameter.
-VAL is a value of this parameter.")
-(put 'guix-entries 'permanent-local t)
-
-(defvar-local guix-buffer-type nil
-  "Type of the current buffer.")
-(put 'guix-buffer-type 'permanent-local t)
-
-(defvar-local guix-entry-type nil
-  "Type of the current entry.")
-(put 'guix-entry-type 'permanent-local t)
-
-(defvar-local guix-search-type nil
-  "Type of the current search.")
-(put 'guix-search-type 'permanent-local t)
-
-(defvar-local guix-search-vals nil
-  "Values of the current search.")
-(put 'guix-search-vals 'permanent-local t)
-
-(defsubst guix-set-vars (profile entries buffer-type entry-type
-                         search-type search-vals)
-  "Set local variables for the current Guix buffer."
-  (setq default-directory profile
-        guix-profile      profile
-        guix-entries      entries
-        guix-buffer-type  buffer-type
-        guix-entry-type   entry-type
-        guix-search-type  search-type
-        guix-search-vals  search-vals))
-
-(defun guix-get-symbol (postfix buffer-type &optional entry-type)
-  (intern (concat "guix-"
-                  (when entry-type
-                    (concat (symbol-name entry-type) "-"))
-                  (symbol-name buffer-type) "-" postfix)))
-
-(defmacro guix-define-buffer-type (buf-type entry-type &rest args)
-  "Define common for BUF-TYPE buffers for displaying ENTRY-TYPE entries.
-
-In the text below TYPE means ENTRY-TYPE-BUF-TYPE.
-
-This macro defines `guix-TYPE-mode', a custom group and several
-user variables.
-
-The following stuff should be defined outside this macro:
-
-  - `guix-BUF-TYPE-mode' - parent mode for the defined mode.
-
-  - `guix-TYPE-mode-initialize' (optional) - function for
-  additional mode settings; it is called without arguments.
-
-Remaining argument (ARGS) should have a form [KEYWORD VALUE] ...  The
-following keywords are available:
-
-  - `:buffer-name' - default value for the defined
-    `guix-TYPE-buffer-name' variable.
-
-  - `:required' - default value for the defined
-    `guix-TYPE-required-params' variable.
-
-  - `:history-size' - default value for the defined
-    `guix-TYPE-history-size' variable.
-
-  - `:revert' - default value for the defined
-    `guix-TYPE-revert-no-confirm' variable."
-  (let* ((entry-type-str (symbol-name entry-type))
-         (buf-type-str   (symbol-name buf-type))
-         (Entry-type-str (capitalize entry-type-str))
-         (Buf-type-str   (capitalize buf-type-str))
-         (entry-str      (concat entry-type-str " entries"))
-         (buf-str        (concat buf-type-str " buffer"))
-         (prefix         (concat "guix-" entry-type-str "-" buf-type-str))
-         (group          (intern prefix))
-         (faces-group    (intern (concat prefix "-faces")))
-         (mode-map-str   (concat prefix "-mode-map"))
-         (parent-mode    (intern (concat "guix-" buf-type-str "-mode")))
-         (mode           (intern (concat prefix "-mode")))
-         (mode-init-fun  (intern (concat prefix "-mode-initialize")))
-         (buf-name-var   (intern (concat prefix "-buffer-name")))
-         (revert-var     (intern (concat prefix "-revert-no-confirm")))
-         (history-var    (intern (concat prefix "-history-size")))
-         (params-var     (intern (concat prefix "-required-params")))
-         (buf-name-val   (format "*Guix %s %s*" Entry-type-str Buf-type-str))
-         (revert-val     nil)
-         (history-val    20)
-         (params-val     '(id)))
-
-    ;; Process the keyword args.
-    (while (keywordp (car args))
-      (pcase (pop args)
-	(`:required     (setq params-val (pop args)))
-	(`:history-size (setq history-val (pop args)))
-	(`:revert       (setq revert-val (pop args)))
-        (`:buffer-name  (setq buf-name-val (pop args)))
-	(_ (pop args))))
-
-    `(progn
-       (defgroup ,group nil
-         ,(concat Buf-type-str " buffer with " entry-str ".")
-         :prefix ,(concat prefix "-")
-         :group ',(intern (concat "guix-" buf-type-str)))
-
-       (defgroup ,faces-group nil
-         ,(concat "Faces for " buf-type-str " buffer with " entry-str ".")
-         :group ',(intern (concat "guix-" buf-type-str "-faces")))
-
-       (defcustom ,buf-name-var ,buf-name-val
-         ,(concat "Default name of the " buf-str " for displaying " entry-str ".")
-         :type 'string
-         :group ',group)
-
-       (defcustom ,history-var ,history-val
-         ,(concat "Maximum number of items saved in the history of the " buf-str ".\n"
-                  "If 0, the history is disabled.")
-         :type 'integer
-         :group ',group)
-
-       (defcustom ,revert-var ,revert-val
-         ,(concat "If non-nil, do not ask to confirm for reverting the " buf-str ".")
-         :type 'boolean
-         :group ',group)
-
-       (defvar ,params-var ',params-val
-         ,(concat "List of required " entry-type-str " parameters.\n\n"
-                  "Displayed parameters and parameters from this list are received\n"
-                  "for each " entry-type-str ".\n\n"
-                  "May be a special value `all', in which case all supported\n"
-                  "parameters are received (this may be very slow for a big number\n"
-                  "of entries).\n\n"
-                  "Do not remove `id' from this list as it is required for\n"
-                  "identifying an entry."))
-
-       (define-derived-mode ,mode ,parent-mode ,(concat "Guix-" Buf-type-str)
-         ,(concat "Major mode for displaying information about " entry-str ".\n\n"
-                  "\\{" mode-map-str "}")
-         (setq-local revert-buffer-function 'guix-revert-buffer)
-         (setq-local guix-history-size ,history-var)
-         (and (fboundp ',mode-init-fun) (,mode-init-fun))))))
-
-(put 'guix-define-buffer-type 'lisp-indent-function 'defun)
-
-
-;;; Getting and displaying info about packages and generations
-
-(defcustom guix-package-list-type 'output
-  "Define how to display packages in a list buffer.
-May be a symbol `package' or `output' (if `output', display each
-output on a separate line; if `package', display each package on
-a separate line)."
-  :type '(choice (const :tag "List of packages" package)
-                 (const :tag "List of outputs" output))
-  :group 'guix)
-
-(defcustom guix-package-info-type 'package
-  "Define how to display packages in an info buffer.
-May be a symbol `package' or `output' (if `output', display each
-output separately; if `package', display outputs inside a package
-information)."
-  :type '(choice (const :tag "Display packages" package)
-                 (const :tag "Display outputs" output))
-  :group 'guix)
-
-(defun guix-get-entries (profile entry-type search-type search-vals
-                         &optional params)
-  "Search for entries of ENTRY-TYPE.
-
-Call an appropriate scheme function and return a list of the
-form of `guix-entries'.
-
-ENTRY-TYPE should be one of the following symbols: `package',
-`output' or `generation'.
-
-SEARCH-TYPE may be one of the following symbols:
-
-- If ENTRY-TYPE is `package' or `output': `id', `name', `regexp',
-  `all-available', `newest-available', `installed', `obsolete',
-  `generation'.
-
-- If ENTRY-TYPE is `generation': `id', `last', `all', `time'.
-
-PARAMS is a list of parameters for receiving.  If nil, get
-information with all available parameters."
-  (guix-eval-read (guix-make-guile-expression
-                   'entries
-                   profile params entry-type search-type search-vals)))
-
-(defun guix-get-show-entries (profile buffer-type entry-type search-type
-                              &rest search-vals)
-  "Search for ENTRY-TYPE entries and show results in BUFFER-TYPE buffer.
-See `guix-get-entries' for the meaning of SEARCH-TYPE and SEARCH-VALS."
-  (let ((entries (guix-get-entries profile entry-type search-type search-vals
-                                   (guix-get-params-for-receiving
-                                    buffer-type entry-type))))
-    (guix-set-buffer profile entries buffer-type entry-type
-                     search-type search-vals)))
-
-(defun guix-set-buffer (profile entries buffer-type entry-type search-type
-                        search-vals &optional history-replace no-display)
-  "Set up BUFFER-TYPE buffer for displaying ENTRY-TYPE ENTRIES.
-
-Insert ENTRIES in buffer, set variables and make history item.
-ENTRIES should have a form of `guix-entries'.
-
-See `guix-get-entries' for the meaning of SEARCH-TYPE and SEARCH-VALS.
-
-If HISTORY-REPLACE is non-nil, replace current history item,
-otherwise add the new one.
-
-If NO-DISPLAY is non-nil, do not switch to the buffer."
-  (when entries
-    (let ((buf (if (and (eq major-mode
-                            (guix-get-symbol "mode" buffer-type entry-type))
-                        (equal guix-profile profile))
-                   (current-buffer)
-                 (get-buffer-create
-                  (guix-buffer-name profile buffer-type
-                                    entry-type search-type)))))
-      (with-current-buffer buf
-        (guix-show-entries entries buffer-type entry-type)
-        (guix-set-vars profile entries buffer-type entry-type
-                       search-type search-vals)
-        (funcall (if history-replace
-                     #'guix-history-replace
-                   #'guix-history-add)
-                 (guix-make-history-item)))
-      (or no-display
-          (guix-switch-to-buffer buf))))
-  (guix-result-message profile entries entry-type
-                       search-type search-vals))
-
-(defun guix-show-entries (entries buffer-type entry-type)
-  "Display ENTRY-TYPE ENTRIES in the current BUFFER-TYPE buffer."
-  (let ((inhibit-read-only t))
-    (erase-buffer)
-    (funcall (symbol-function (guix-get-symbol
-                               "mode" buffer-type entry-type)))
-    (funcall (guix-get-symbol "insert-entries" buffer-type)
-             entries entry-type)
-    (goto-char (point-min))))
-
-(defun guix-history-call (profile entries buffer-type entry-type
-                          search-type search-vals)
-  "Function called for moving by history."
-  (guix-show-entries entries buffer-type entry-type)
-  (guix-set-vars profile entries buffer-type entry-type
-                 search-type search-vals)
-  (guix-result-message profile entries entry-type
-                       search-type search-vals))
-
-(defun guix-make-history-item ()
-  "Make and return a history item for the current buffer."
-  (list #'guix-history-call
-        guix-profile guix-entries guix-buffer-type guix-entry-type
-        guix-search-type guix-search-vals))
-
-(defun guix-get-params-for-receiving (buffer-type entry-type)
-  "Return parameters that should be received for BUFFER-TYPE, ENTRY-TYPE."
-  (let* ((required-var (guix-get-symbol "required-params"
-                                        buffer-type entry-type))
-         (required (symbol-value required-var)))
-    (unless (equal required 'all)
-      (cl-union required
-                (funcall (guix-get-symbol "get-displayed-params"
-                                          buffer-type)
-                         entry-type)))))
-
-(defun guix-revert-buffer (_ignore-auto noconfirm)
-  "Update information in the current buffer.
-The function is suitable for `revert-buffer-function'.
-See `revert-buffer' for the meaning of NOCONFIRM."
-  (when (or noconfirm
-            (symbol-value
-             (guix-get-symbol "revert-no-confirm"
-                              guix-buffer-type guix-entry-type))
-            (y-or-n-p "Update current information? "))
-    (let* ((search-type guix-search-type)
-           (search-vals guix-search-vals)
-           (params (guix-get-params-for-receiving guix-buffer-type
-                                                  guix-entry-type))
-           (entries (guix-get-entries
-                     guix-profile guix-entry-type
-                     guix-search-type guix-search-vals params))
-           ;; If a REPL was restarted, package/output IDs are not actual
-           ;; anymore, because 'object-address'-es died with the REPL, so if a
-           ;; search by ID didn't give results, search again by name.
-           (entries (if (and (null entries)
-                             (eq guix-search-type 'id)
-                             (or (eq guix-entry-type 'package)
-                                 (eq guix-entry-type 'output)))
-                        (progn
-                          (setq search-type 'name
-                                search-vals (guix-entries-to-specifications
-                                             guix-entries))
-                          (guix-get-entries
-                           guix-profile guix-entry-type
-                           search-type search-vals params))
-                      entries)))
-      (guix-set-buffer guix-profile entries guix-buffer-type guix-entry-type
-                       search-type search-vals t t))))
-
-(cl-defun guix-redisplay-buffer (&key buffer profile entries buffer-type
-                                      entry-type search-type search-vals)
-  "Redisplay a Guix BUFFER.
-Restore the point and window positions after redisplaying if possible.
-
-This function will not update the information, use
-\"\\[revert-buffer]\" if you want the full update.
-
-If BUFFER is nil, use the current buffer.  For the meaning of the
-rest arguments, see `guix-set-buffer'."
-  (interactive)
-  (or buffer (setq buffer (current-buffer)))
-  (with-current-buffer buffer
-    (or (derived-mode-p 'guix-info-mode 'guix-list-mode)
-        (error "%S is not a Guix buffer" buffer))
-    (let* ((point (point))
-           (was-at-button (button-at point))
-           ;; For simplicity, ignore an unlikely case when multiple
-           ;; windows display the same BUFFER.
-           (window (car (get-buffer-window-list buffer nil t)))
-           (window-start (and window (window-start window))))
-      (guix-set-buffer (or profile     guix-profile)
-                       (or entries     guix-entries)
-                       (or buffer-type guix-buffer-type)
-                       (or entry-type  guix-entry-type)
-                       (or search-type guix-search-type)
-                       (or search-vals guix-search-vals)
-                       t t)
-      (goto-char point)
-      (and was-at-button
-           (not (button-at (point)))
-           (forward-button 1))
-      (when window
-        (set-window-point window (point))
-        (set-window-start window window-start)))))
-
-
-;;; Generations
-
-(defcustom guix-generation-packages-buffer-name-function
-  #'guix-generation-packages-buffer-name-default
-  "Function used to define name of a buffer with generation packages.
-This function is called with 2 arguments: PROFILE (string) and
-GENERATION (number)."
-  :type '(choice (function-item guix-generation-packages-buffer-name-default)
-                 (function-item guix-generation-packages-buffer-name-long)
-                 (function :tag "Other function"))
-  :group 'guix)
-
-(defcustom guix-generation-packages-update-buffer t
-  "If non-nil, always update list of packages during comparing generations.
-If nil, generation packages are received only once.  So when you
-compare generation 1 and generation 2, the packages for both
-generations will be received.  Then if you compare generation 1
-and generation 3, only the packages for generation 3 will be
-received.  Thus if you use comparing of different generations a
-lot, you may set this variable to nil to improve the
-performance."
-  :type 'boolean
-  :group 'guix)
-
-(defvar guix-output-name-width 30
-  "Width of an output name \"column\".
-This variable is used in auxiliary buffers for comparing generations.")
-
 (defun guix-generation-file (profile generation)
   "Return the file name of a PROFILE's GENERATION."
   (format "%s-%s-link" profile generation))
@@ -724,74 +100,14 @@ this generation."
                         (guix-generation-file profile generation)
                       profile)))
 
-(defun guix-generation-packages (profile generation)
-  "Return a list of sorted packages installed in PROFILE's GENERATION.
-Each element of the list is a list of the package specification and its path."
-  (let ((names+paths (guix-eval-read
-                      (guix-make-guile-expression
-                       'generation-package-specifications+paths
-                       profile generation))))
-    (sort names+paths
-          (lambda (a b)
-            (string< (car a) (car b))))))
-
-(defun guix-generation-packages-buffer-name-default (profile generation)
-  "Return name of a buffer for displaying GENERATION's package outputs.
-Use base name of PROFILE path."
-  (let ((profile-name (file-name-base (directory-file-name profile))))
-    (format "*Guix %s: generation %s*"
-            profile-name generation)))
-
-(defun guix-generation-packages-buffer-name-long (profile generation)
-  "Return name of a buffer for displaying GENERATION's package outputs.
-Use the full PROFILE path."
-  (format "*Guix generation %s (%s)*"
-          generation profile))
-
-(defun guix-generation-packages-buffer-name (profile generation)
-  "Return name of a buffer for displaying GENERATION's package outputs."
-  (let ((fun (if (functionp guix-generation-packages-buffer-name-function)
-                 guix-generation-packages-buffer-name-function
-               #'guix-generation-packages-buffer-name-default)))
-    (funcall fun profile generation)))
-
-(defun guix-generation-insert-package (name path)
-  "Insert package output NAME and PATH at point."
-  (insert name)
-  (indent-to guix-output-name-width 2)
-  (insert path "\n"))
-
-(defun guix-generation-insert-packages (buffer profile generation)
-  "Insert package outputs installed in PROFILE's GENERATION in BUFFER."
-  (with-current-buffer buffer
-    (setq buffer-read-only nil
-          indent-tabs-mode nil)
-    (erase-buffer)
-    (mapc (lambda (name+path)
-            (guix-generation-insert-package
-             (car name+path) (cadr name+path)))
-          (guix-generation-packages profile generation))))
-
-(defun guix-generation-packages-buffer (profile generation)
-  "Return buffer with package outputs installed in PROFILE's GENERATION.
-Create the buffer if needed."
-  (let ((buf-name (guix-generation-packages-buffer-name
-                   profile generation)))
-    (or (and (null guix-generation-packages-update-buffer)
-             (get-buffer buf-name))
-        (let ((buf (get-buffer-create buf-name)))
-          (guix-generation-insert-packages buf profile generation)
-          buf))))
-
-(defun guix-profile-generation-manifest-file (generation)
-  "Return the file name of a GENERATION's manifest.
-GENERATION is a generation number of `guix-profile' profile."
-  (guix-manifest-file guix-profile generation))
-
-(defun guix-profile-generation-packages-buffer (generation)
-  "Insert GENERATION's package outputs in a buffer and return it.
-GENERATION is a generation number of `guix-profile' profile."
-  (guix-generation-packages-buffer guix-profile generation))
+;;;###autoload
+(defun guix-edit (id-or-name)
+  "Edit (go to location of) package with ID-OR-NAME."
+  (interactive (list (guix-read-package-name)))
+  (let ((loc (guix-package-location id-or-name)))
+    (if loc
+        (guix-find-location loc)
+      (message "Couldn't find package location."))))
 
 
 ;;; Actions on packages and generations
@@ -865,101 +181,6 @@ VARIABLE is a name of an option variable.")
       guix-operation-option-true-string
     guix-operation-option-false-string))
 
-(defun guix-process-package-actions (profile actions
-                                     &optional operation-buffer)
-  "Process package ACTIONS on PROFILE.
-Each action is a list of the form:
-
-  (ACTION-TYPE PACKAGE-SPEC ...)
-
-ACTION-TYPE is one of the following symbols: `install',
-`upgrade', `remove'/`delete'.
-PACKAGE-SPEC should have the following form: (ID [OUTPUT] ...)."
-  (let (install upgrade remove)
-    (mapc (lambda (action)
-            (let ((action-type (car action))
-                  (specs (cdr action)))
-              (cl-case action-type
-                (install (setq install (append install specs)))
-                (upgrade (setq upgrade (append upgrade specs)))
-                ((remove delete) (setq remove (append remove specs))))))
-          actions)
-    (when (guix-continue-package-operation-p
-           profile
-           :install install :upgrade upgrade :remove remove)
-      (guix-eval-in-repl
-       (guix-make-guile-expression
-        'process-package-actions profile
-        :install install :upgrade upgrade :remove remove
-        :use-substitutes? (or guix-use-substitutes 'f)
-        :dry-run? (or guix-dry-run 'f))
-       (and (not guix-dry-run) operation-buffer)))))
-
-(cl-defun guix-continue-package-operation-p (profile
-                                             &key install upgrade remove)
-  "Return non-nil if a package operation should be continued.
-Ask a user if needed (see `guix-operation-confirm').
-INSTALL, UPGRADE, REMOVE are 'package action specifications'.
-See `guix-process-package-actions' for details."
-  (or (null guix-operation-confirm)
-      (let* ((entries (guix-get-entries
-                       profile 'package 'id
-                       (append (mapcar #'car install)
-                               (mapcar #'car upgrade)
-                               (mapcar #'car remove))
-                       '(id name version location)))
-             (install-strings (guix-get-package-strings install entries))
-             (upgrade-strings (guix-get-package-strings upgrade entries))
-             (remove-strings  (guix-get-package-strings remove entries)))
-        (if (or install-strings upgrade-strings remove-strings)
-            (let ((buf (get-buffer-create guix-temp-buffer-name)))
-              (with-current-buffer buf
-                (setq-local cursor-type nil)
-                (setq buffer-read-only nil)
-                (erase-buffer)
-                (insert "Profile: " profile "\n\n")
-                (guix-insert-package-strings install-strings "install")
-                (guix-insert-package-strings upgrade-strings "upgrade")
-                (guix-insert-package-strings remove-strings "remove")
-                (let ((win (temp-buffer-window-show
-                            buf
-                            '((display-buffer-reuse-window
-                               display-buffer-at-bottom)
-                              (window-height . fit-window-to-buffer)))))
-                  (prog1 (guix-operation-prompt)
-                    (quit-window nil win)))))
-          (message "Nothing to be done.  If the REPL was restarted, information is not up-to-date.")
-          nil))))
-
-(defun guix-get-package-strings (specs entries)
-  "Return short package descriptions for performing package actions.
-See `guix-process-package-actions' for the meaning of SPECS.
-ENTRIES is a list of package entries to get info about packages."
-  (delq nil
-        (mapcar
-         (lambda (spec)
-           (let* ((id (car spec))
-                  (outputs (cdr spec))
-                  (entry (guix-get-entry-by-id id entries)))
-             (when entry
-               (let ((location (guix-assq-value entry 'location)))
-                 (concat (guix-get-full-name entry)
-                         (when outputs
-                           (concat ":"
-                                   (guix-concat-strings outputs ",")))
-                         (when location
-                           (concat "\t(" location ")")))))))
-         specs)))
-
-(defun guix-insert-package-strings (strings action)
-  "Insert information STRINGS at point for performing package ACTION."
-  (when strings
-    (insert "Package(s) to " (propertize action 'face 'bold) ":\n")
-    (mapc (lambda (str)
-            (insert "  " str "\n"))
-          strings)
-    (insert "\n")))
-
 (defun guix-operation-prompt (&optional prompt)
   "Prompt a user for continuing the current operation.
 Return non-nil, if the operation should be continued; nil otherwise.
@@ -1014,34 +235,6 @@ Ask a user with PROMPT for continuing an operation."
                  guix-operation-option-separator)))
   (force-mode-line-update))
 
-(defun guix-delete-generations (profile generations
-                                &optional operation-buffer)
-  "Delete GENERATIONS from PROFILE.
-Each element from GENERATIONS is a generation number."
-  (when (or (not guix-operation-confirm)
-            (y-or-n-p
-             (let ((count (length generations)))
-               (if (> count 1)
-                   (format "Delete %d generations from profile '%s'? "
-                           count profile)
-                 (format "Delete generation %d from profile '%s'? "
-                         (car generations) profile)))))
-    (guix-eval-in-repl
-     (guix-make-guile-expression
-      'delete-generations* profile generations)
-     operation-buffer)))
-
-(defun guix-switch-to-generation (profile generation
-                                  &optional operation-buffer)
-  "Switch PROFILE to GENERATION."
-  (when (or (not guix-operation-confirm)
-            (y-or-n-p (format "Switch profile '%s' to generation %d? "
-                              profile generation)))
-    (guix-eval-in-repl
-     (guix-make-guile-expression
-      'switch-to-generation* profile generation)
-     operation-buffer)))
-
 (defun guix-package-source-path (package-id)
   "Return a store file path to a source of a package PACKAGE-ID."
   (message "Calculating the source derivation ...")
@@ -1075,12 +268,12 @@ See Info node `(guix) Invoking guix package' for details.
 Interactively, use the current profile and prompt for manifest
 FILE.  With a prefix argument, also prompt for PROFILE."
   (interactive
-   (let* ((default-profile (or guix-profile guix-current-profile))
+   (let* ((current-profile (guix-ui-current-profile))
           (profile (if current-prefix-arg
                        (guix-profile-prompt)
-                     default-profile))
+                     (or current-profile guix-current-profile)))
           (file (read-file-name "File with manifest: "))
-          (buffer (and guix-profile (current-buffer))))
+          (buffer (and current-profile (current-buffer))))
      (list profile file buffer)))
   (when (or (not guix-operation-confirm)
             (y-or-n-p (format "Apply manifest from '%s' to profile '%s'? "
@@ -1174,12 +367,12 @@ The function is called with a single argument - a command line string."
 (defun guix-update-buffers-maybe-after-pull ()
   "Update buffers depending on `guix-update-after-pull'."
   (when guix-update-after-pull
-    (mapc #'guix-update-buffer
+    (mapc #'guix-ui-update-buffer
           ;; No need to update "generation" buffers.
-          (guix-buffers '(guix-package-list-mode
-                          guix-package-info-mode
-                          guix-output-list-mode
-                          guix-output-info-mode)))
+          (guix-ui-buffers '(guix-package-list-mode
+                             guix-package-info-mode
+                             guix-output-list-mode
+                             guix-output-info-mode)))
     (message "Guix buffers have been updated.")))
 
 ;;;###autoload